Feb
27
Tamron AF 18-250mm Di-II Macro Lens - untuk mereka yang belum punya lensa all-in-one ultra zoom
Tamron unveils a compact, lightweight and ultimate high power zoom lens boasting the world’s first 13.9X zoom power designed exclusively for APS-C sized digital SLRs. Extending the tele-end of the popular 18-200mm all-in-one zoom to 250mm ultra telephoto makes this new 18-250mm Di-II zoom the most versatile high power zoom lens available.
Kabar baik, bagi mereka yang menginginkan lensa all-in-one zoom lens, tetapi tidak sanggup membayar mahal lensa produksi satu merek dengan merek body DSLR anda.
Saya gak punya lensa ini. Tetapi tertarik dengan rentang zoomnya dari 18-250mm! Dewasa ini zoom lens terlebar adalah 18-200mm. tapi Tamron mencoba melewati batasan itu. Hebatnya lagi, lensanya kecil, ringan, dan katanya high power zoom. Namun bagaimana dengan hasil jepretannya? Beberapa orang merasa cukup puas dengan hasilnya. Khususnya untuk daylight (foto normal siang hari). Dari beberapa photo sample yang dishare sama kawan-kawan pemakai lensa ini, bisa ditarik kesimpulan mentah (gak mutlak. karena banyak faktor yang mempengaruhi bagus tidaknya sebuah foto). Wide focal 18mm fotonya gak kalah sama zoom lens lain yang berfocal awal 18mm. Tele focal di 250mm hasilnya agak kurang akurat (namun toh bisa diperbaiki di pc). Yang menakjubkan adalah features macro-nya di focal 250mm. Bokehnya mantap semantap dedicated macro lens!
Untuk sebuah lensa seharga kurang dari 5 juta, lensa ini layak untuk dipertimbangkan. Bagi mereka yang belum punya lensa rentang zoom lebar. aku sih gak butuh lagi. udah ada 18-200mm… VR lagi… hehehe
Berikut beberapa features andalan dari lensa ini (disarikan dari berbagai sumber)
13.9X, the Largest Zoom Power in the High Power Zoom Class, Covering an Easy-to-use 28mm Wideangle to 388mm Ultra Telephoto (when converted to 35mm)
Tamron’s concept for the development of high power zoom lenses is “one-does-it-all, covering wideangle to telephoto” to satisfy customer needs for simplicity. Tamron has always kept this concept in mind when designing higher power zoom ranges. The question, “to what extent can the tele-end of a zoom starting with 18mm wideangle be extended in a lens designed for exclusive use with digital SLRs?” was posed and answered with the development of this ultra high power zoom lens possessing the world’s largest zoom ratio of 13.9X. It is not too long ago that the world of “wideangle to ultra telephoto film photography” could only be achieved with a combination of two zoom lenses; 28-200mm + 200-400mm. Now, the world of digital SLR photography can be enjoyed with just a single zoom lens! Around year 2000. A combination of 28-200mm (Model 371D) and 200-400mmAdvanced Optical Design Aimed at Optimum Power Distribution to Achieve Compactness and High Power
The optical system uses an LD (Low Dispersion) glass element and one AD (Anomalous Dispersion) lens in the first group to minimize on-axis chromatic aberration while achieving the 250mm ultra-tele focal length. In addition, suitable positioning of two hybrid aspherical lens elements serves to meet the desired compactness despite its 13.9X zoom power. In particular, Tamron’s engineers have pursued a thorough analysis of the optical configuration of the third lens group for optimum power distribution in the overall optical system. The approach has resulted in the sufficient compensation of aberrations, including astigmatism; the compactness, thanks to downsizing of the first group; the high zoom power; and optimum optical quality. In order to realize the remarkable 13.9X zoom ratio, Tamron has pursued the approach to accomplish the compactness through optimization of the overall optical system, not through the employment of XR glass elements.Revolutionary Minimum Focusing Distance of 0.45m (17.7″) throughout the Entire Zoom Range Affords a 1:3.5 Macro Capability
The new zoom lens achieves a minimum focus distance of 0.45m (17.7″) throughout the entire zoom range, top of the class capability among high power zoom lenses for digital SLR cameras, which results in a maximum magnification ratio of 1:3.5 at the 250mm tele-end. Since the APS-C sized imager is smaller than the 35mm format film, the new zoom lens can fill the frame with almost the same scope (approx. 8 x 5.5cm) as a lens with a maximum magnification ratio of 1:2.3 on a 35mm film SLR camera.Optical Design Dedicated for Digital SLR Photography by Optimizing the Angle of Incidence of Light Rays Reaching the Image Sensor
The zoom lens uses an optical system designed to confine the changing angles of incidence of light rays reaching the imager within a certain scope over the entire image field by considering the effects of variance due to zooming.Outstanding Resolution
Since the lens is designed exclusively for digital SLR photography, it provides high image quality resolution, contrast and flatness of image field.Internal Surface Coating to Reduce Ghosting and Flare
Through the use of “Internal Surface Coatings” (i.e., multiple-layer coatings on cemented surfaces of plural elements) and new multiple-layer coating technology on ordinary elements, ghosting and flare due to reflections that occur when light enters through the front element and reflections caused by the imager itself are reduced to the absolute minimumUltra High Zoom Power, yet Lightweight and Compact Design Thanks to New Mechanical Devices
Complicated mechanisms are built into the compact body, thanks to new mechanical devices, for excellent portability and ease of use. Based on the mechanical construction of the AF28-300mm (Model A061), Tamron has revolutionized accumulated mechanical design technologies by reviewing the roles respective barrel parts play in order to achieve the high power, compactness and light weight. Additionally, the production engineering has been completely overhauled to downsize its parts and to increase their precision and durability in order to accommodate the complex structure in the new zoom lens. In order to realize the 13.9X high zoom power, the lens uses a metal mount in all fittings.Zoom Lock Mechanism Incorporated
The zoom lock prevents unwanted barrel extension when carrying the lens/camera combination.Flower-shaped Lens Hood
A flower-shaped lens hood is included as a standard accessory. The special hood provides optimum shading of superfluous light rays that enter from the rectangular frame outside the image field.New External Design of the New Di-II Series Conveys the Image of “High Performance, High Precision”
1. Improvements have been made to the external design by adding a gold-colored band between the focus and zoom rings to enhance the appearance and make the product stand out as a Di-II lens.
2. Also, the black coating over the entire lens barrel creates a high-quality, sophisticated look.
3. The rubber patterns of the focus and zoom rings have also been improved to complement the digital camera style and to provide better handling.
Sekedar referensi tambahan lihatlah bagaimana Andre Costantini menciptakan foto-foto bagus dengan lensa Tamron 18-250mm di http://www.howishotit.com
Posted on Wednesday, February 27th, 2008 by Imp. Winartho
Tags: 18-250mm, lens, lensa murah, tamron, zoom lens
















2008-02-27 18:12:14
I found your site on technorati and read a few of your other posts. Keep up the good work. I just added your RSS feed to my Google News Reader. Looking forward to reading more from you.
Jason Rakowski
2008-02-27 18:33:25
thank you for your visit, jason.
2008-02-28 03:55:29
Lineup Tamron emang menarik2, dengan harga yang menarik juga, kayaknya tradisionalnya buat spek yang sama kira2 separo harga lensa yang semerk sama bodi (kecuali kalo bodinya Sigma, hehe). Buat yang ngejar tele dan pengen VR/IS, dia malah udah ngeluarin 28-300 dengan VC (vibrator compensation). Apa gak mantap tuh.
Cuman ya prinsip Haji Gojali, Bandar Beras di Pasar Induk Kramat Jati lah, ada harga ada rupa. Sebagai penganut Nikon, saya sih lebih milih hunting Nikkor bekas deh daripada Tamron baru. Nikkor 18-200 VR kan ngepop banget, gampang nyari 2nd nya. Selisihnya gak seberapa dibanding Tamron baru. Lagian namanya lensa, beli lensa 2nd resikonya nggak setinggi beli sepeda motor 2nd kan.
Kecuali emang barang agak langka ya apa boleh buat. Sekalian numpang nih, kalo ada yang punya 35-70mm f/2.8 2nd dan mo dilepas. Hehehehe. Daripada kepaksa ambil Tammy 28-75.
2008-02-28 04:22:00
jangan pernah merasa kepaksa mas. aku punya 24-70mm f/2.8 VR mau? kan lebih lebar dari 35-70mm sama-sama f/2.8. ada plus VR lagi.
2008-02-28 05:02:03
Udah ada toh 24-70mm f/2.8 yang pake VR. Hihi, kalo temen yang punya … boleh nyicip nggak yaaa.
Kalo itu mah nggak ku ku Bos. Lha yang nggak pake VR aja harganya selangit. Makanya nyari 35-70 bekas, lebih sempit rangenya gpp, gak ada VR gpp, gak AF-S gpp, pulang nggak diaterin gpp, pokok kantong nyampe.
Ya kepaksa, lha kesanggupannya cuman sampe 1/6 harga lensa sampeyan. Hiks hiks hiks.
2008-02-28 09:39:03
punya. tapi masih di jpc. gimana dunk?
tolong ambilin ya… trus nanti aku sing pinjem karo sampeyan. heheh
2008-02-28 09:50:36
Gedubraaaaks. Kalo Mas yang ngambil, itu mungkin mimpi. Kalo aku yang ngambil, itu namanya mimpi di siang bolong, dibawah pohon kelapa, kejatohan kelapa, nyemplung ke kali …